Musical instrument



W. C. ROBERT S. MUSICAL INSTRUMENT.

APPLICATION FILED on. 18, 1920.

1,397,019. Patented Nov. 15, 1921.

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\ I Q I 12 v WALTON o. ROBERTS,

OF SUMMIT, GEORGIA.

MUSICAL INSTRUMENT.

Specification of Letters Patent.

Patented Nov. 15, 1921..

Application filed October 18, 1920. Serial No. 417,657.

To all whom it may concern.

Be it known that I, WVALTON C. ROBERTS, a citizen of the United States, residing at Summit, in the county of Emanuel and State of Georgia, have invented a new and useful Musical Instrument, of which the following is a specification.

By way of explanation it may be stated that, in musical instruments of the. trumpet type, it is frequently necessary to remove from the valve casing, the cap in which the stem of the valve reciprocates. Hitherto this cap has been threaded to the casing and the removal and replacing of the cap has called for a nicety andcare in operation which can hardly be given, notably if the cap must be removed and replaced while the player pauses in the midst of a selection which is being rendered.

In view of the foregoing it is the object of this invention to provide a simple means whereby a cap which is free from screw connection with the valve casing, may be securely held upon the casing and be readily detached therefrom.

Figure 1 shows in side elevation, a device constructed in accordance with the invention; Fig. 2 is a fragmental longitudinal section wherein parts appear in elevation; Fig. 3 is a side elevation wherein the device is viewed at right angles to the showing of Fig. 1; Fig. 4 is a fragmental longitudinal section showing a modification; Fig. 5 is a cross section on the line 55 of Fig. 4; and Fig. 6 is a side elevation wherein parts are broken away.

The drawing discloses merely a typical embodiment of the invention, and within the scope of what is claimed, changes falling within the skill of a mechanic may be made without departing from the spirit of the invention.

In the drawings, numeral 1 denotes the valve casing of a musical instrument of the trumpet type, a valve 2 being mounted to reciprocate in the casing, the valve having a stem 3. The numeral 4 designates a cap in which the stem 3 slides, the cap including a flange 5 surrounding the casing 1 but free from screw connection therewith. The flange 5 is supplied in its lower edge with a notch 6, above which is located a projection 7 having an opening 8. A keeper 9 projects from the casing 1 and is received in the notch 6, the keeper including an angular extension or end 10 which projects in a direction substantially parallel to the axis of the casing 1.

The invention includes a loop-shaped link 11 having outwardly convexed sides 12, giving resiliency to the link. One end of the link 11 is pivotally mounted in the open mg 8 of the projection 7 upon the cap 4, the other end of the link being pivotally mounted-in an opening 16 formed in a latch 14 intermediate the ends thereof. The latch 14 includes an outwardly projecting nose or end 15, coacting with the extension 11 0f the keeper 9 in a manner to be pointed out hereinafter.

Presupposing that the parts are disposed as shown in Fig. 2, it will be obvious that by swinging the lower end of the latch 14 upwardly, the nose 15 of the latch may be disengaged from the end 10'of the keeper 9, it being possible to remove the cap 4 without diiliculty. This operation can be carried out with great rapidity, and all of the disadvantages attendant upon threading the cap 4 upon the casing 1 will be avoided. After the cap 4 has been replaced on the casing 1, the nose 15 of the latch 14 is engaged beneath the end 10 of the keeper 9, the lower end of the latch 14 being swung downwardly, until the said lower end abuts against the casing 1 as shown in Fig. 2. Owing to the fact that the link 11 includes the outwardly convexed sides 12, the link will possess great resiliency and will serve to draw down the cap 4 on the casing 1. Further, since the keeper 8 includes the angular end or extension 10, with which the nose 15 of the latch 14 engages, a lateral movement in the direction of the arrow A will be given to the cap 4 when the latch 14 is swung into the position of Fig. 2, the cap being bound tightly against the casingl at a point diametrically opposite to the latch 14, and an upward tilting of the cap 4 at a point diametrically opposite to the latch 14 being avoided. Since the keeper 9 is received in the notch 6 of the flange 5, a circumferential movement of the cap upon the casing 1 cannot take place.

In Figs. 4, 5 and 6, the casing appears at 25 and the cap at 26. The casing 25 has spaced undercut lugs 27, the flange 28 of the cap 26 having lugs 29 engaged beneath the lugs 27 of the casing, the lugs 27 and 29 being inclined circumferentially of the casing, as indicated at 30. The cap 26 may be placed on the casing 25, the lugs 29 on the man cap being located between the lugs 27 on the casing. Then, when the cap is rotated, the lug 29 on the cap will engage beneath the lugs 27 on the casing and bind thereagainst, owing to the fact that the lugs 27 and 29 are mutually inclined, circumferentially of the casing, as indicated at 30.

Having thus described the invention, what is claimed is 1. In a musical instrument of the trumpet type, a casing; a cap on the casing and free from screw connection therewith, the cap being removable bodily from the casing; interengaging parts on the casing and the cap coacting to hold the cap on'the casing; a

valve mounted to reciprocate in the casing; and a stem cooperating with the valve and slidable in the cap.

2. In a musical instrument of the trumpet type, a casing having a keeper; a cap on the casing and freefrom screw connection therewith; a link pivoted at one end to the cap; a latch pivotally supported intermediate its ends upon the other end of the link, one end of the latch being engaged beneath the keeper, and the other end of the latch engaging the casing; a valve mounted to reciprocate in the casing; and a stem cooperating with thevalve and slidable in the cap.

3. In amusical instrument of the trumpet type, a casing having a keeper; a cap on the casing and free from screw connection therewith; a resilient loop-shaped link having curved sides, one end of the link being pivoted to. the cap; a latch pivotally supported intermediate its ends upon the other end of the link, one end of the latch being.

engaged beneath the keeper and theother end of the vlatch engaging the casing; a valve mounted to reciprocate in the casing and a stem cooperating with the valve and slidable in the cap.

4. A musical instrumentiof the trumpet type, constructed in accordance with claim 2, and further characterized by the fact that the cap is provided with a flange having a notch which receives the keeper, thereby to V WALTON c. ROBERTS. I

Witnesses:

V. P. ROUNTREE, J. E; PASTON. 

